sims 2 realistic sickness mod

Well THIS can go wrong!

I doanloaded the "sims realistic sickness" mod that can be found here  because my Sims didn't die enough(!)in my medieval themed neighborhood. So what could go wrong with a small rise in the death numbers, afterall I needed this realism.
 Then I went to my main family, the Greyvels. There were 6 of them. Two granpas, two cousins and their wives. Soon there was just one left (you can see him in the pic, wondering about to be or not to be) the rest died (the one woman was expecting, too) no matter how I tried to keep them alive. Was it just me? Was it that family? In conclusion, download with caution!